Hi guys,
Last time I checked, QuoteTracker parse the individual quote pages. You can check this from File->'Fetched page'->'Show last Quote page'. You can use regular expression to parse.
I found it to be delayed by up to 6 min. even though my internet connection is of 128 kbps and I use a high end system. I found Hyperserver for Yahoo to be much faster and is even better than NSE feed. But the speed may vary with the speed of net connection and the system.